Hydraulic jack



O. SCHLEMEYER HYDRAULIC JACK Filed May 27, 1926 April 26, 1927.

INVENTOR. f 1

' Patented Apr. 26, 1927.

curren STATES- PATE 1,626,158 r OFFICE.

orro SCHLEMEYER, or ELECTRA, TEXAS, ASSIGNOB or ONE-HALF T0 a E. SCHEURER,

' or ELEcrnA, TEXAS.

ErnnAuLIc JACK.

Application filed may 27, 1926. Serial No. 111,954.

This invention relates to certain new and therein. An annular chamber 4 is formed useful improvements in jacks and it refers more particularly to an improved hydraulic j ack especially designed for heavy duty, such as in the oil field and similar industries,

the primary object being to provide throughthe peculiararrangement of elements, a stationary inner chamber and an outer housing movable by the action offluid pressure.

lhe invention further contemplates. the prov1s1on of ajack structure whlch is so constructed as to be readily dismantled for repair or other purposes, and in addition to its economical and practical assembly, an added feature in the form of an auxiliary lift foot is made possible by the arrangement of the outer housing, of which the foot forms an integral part.

With these and other objects and advantages in view, the invention has particular reference to the salient features of constructicn and assembly of parts, which will he hereinafter more specifically described and illustrated in the accompanying drawings, wherein: n Y

Figure 1 represents a view of the invention in vertical elevation.

Figure '2 is likewise a'view, in vertical olevation of a jack constructed according to the present invention.

F'gure 3 is a detail view of the operating lever, and j Figure dis a'view on lines H of Figure 2.

lit isiparticularly pointed out in proceeding further, that while there are varied jack structures in which fluid pressure is employed as an operating medium, these such structures are usually dependentnpon the centermost element as an elevating member, while the outer housing and base r stationary. In the construction of the entinvention, the outer housing forms the lifting elemennand in being so .constructed, an added lifting surface," as previously referred to and hereinafter defined, is made possible.

With the above in view, attention is di rected to Figure 1 showing the invention vertical elevation and in which a base member 1 is shown, having an. upwardly extending 'cylinder 2, which latter is provided with an integral head portion 3, having a centrahinteriorly threaded aperture reciprocate within the cylinder 5 above the a valve 6. by the action of the piston rod 8 to which it is attached. A lever arm 9, as in Figure 2 is pivoted at its end to the upper end of the piston rod 8, and through this arm, reciprocal movement of the piston is eiiected, by manual or other actuation of the hand lever 10, arranged to. be detachably mounted upon the squared portion situated in an offset in the outer housing 12, of the pin 11 and upon which the other end of the lever arm 9 is pivotally in Figures2 and d.

Surrounding the bottom of the outer housing 12 is a collar 13, having a lifting surface 14 integral therewith as previously mentioned and illustrated in Figure 2 especially, while the roughened top surface mounted, as shown 150i the housing 12 may he more frequently used. Q

4 in operation the chamber 4: is first charged with fluid of comparatively heavy viscosity and the jack assembled. Pumping of the piston 7 within the cylinder 5 will of course eject the fluid therefrom through the ports 16 in the head 6, up through the piston ports 17 on its down stroke, thence into the upper chamber.18 of the housing 12 to elevate the same. Packing 19, circumferentially surrounding the inner periphery of the/outer housing 12 adjacent its bottom preventing escape of fluid-therefrom. I Now in order to lower the outer housing 12, the lever 20, protruding exteriorly of the cylinder 2, is depressed, which causes upward movement of the valve rod 21. In

this manner the valve 22 is moved. from its:

- vention has been specially shown ,and described, certain changes as to shape, number of parts may be resorted to as fall within the meaning and scope of what is herein claimed.

' I claim:

1. In a hydraulic jack, a

pipe entering said covering centrally thereof and depending within said cylinder to form an annular fluid reservoir; a plunger movable in said pipe to efl'ect removal of fluid from said annular reservoir; an, outer housing movable on said cylinder to receive the fluid removed from said annular chamber, means to eflject. movement of said plunger, and means'to permit". said fluid to be returned to said reservoir to lower the outer. housing.

2. In a hydraulic jack, a base supporting a cylinder; a pipe depending within the cylinder to form an annular fluid reservoir; a

movable pistonwithin said pipe; a movable housing embodying said cylinder, and arranged to receive the' fluid when pumped from said reservoir by the action of said piston, means to'exteriorly actuate said piston, and meansto'return the fluid into said reservoir.

3. In a hydraulic jackga fluid cylinder and reservcnr supported upon a base and 7 having a covering thereon; a pipe entering said covering and depending intcriorly of said cylinder; a movable piston in said pipe having ports therein; a valve in the bottom of said pipe, an outer housing snugly sur-' rounding said cylinder and arranged to receive fluid fromsa'd reservoir toelevatethe same with respect 0 said cylinder; means for exteriorly actuating said piston, and

. means to drain the fluid from said housing to lower the latter.

, 4. In a hydraulic jack, a fluid cylinder and reservoir; a movable housing enclosing said cylinder and arranged to be elevated by i the ingress of fluid from said igeservoir;

meansfor effecting such ingress: said means comprising a plp e depending into said respiston therein; means] for ervoir having a exteriorly actuating said piston, and means v 7 base supporting a cylinder, acovering for said cylinder, a

for retuining said fluid to the reservoir to lower the said housing. 1

5. A hydraulic jack inoludinginner and outer cylindrical members, the latter of which members is provided with liftin sur-' faces adjacent its top and bottom an arranged to be movable; means for retaining fluid within said inner cylinder; means for forcibly transferring said fluid into said outer cylinder to cause the same tomove upward and means for returning said fluid by (gravity into said first cylinder topermit sai outer cylinder to be lowered. f

6. A hydraulic jack including iner and outer cylindrical members, the latter of which is movable. vertically on said inner cylinder, and provided with lifting surfaces adjacentits top and bottom; means for retaining fluid in said first cylinder; means i scribed including an outer-cylinder movable I over a stationary inner cylinder; means for retaining fluid within said latter :cylinder; a member depending within said latter cylinder having a valve and a movable piston therein; means for actuating said piston exteriorly of said outer cylinder to forcibly transfer said fluids'to' raise said outer cylinder and means exteriorly actuated to permit the fluid to return to said inner cylinder. g

8. An apparatus of the character (18'.

scribed having a'stationary base and cylin der fluid reservoir; a cylinder movable outsurfaces adjacent its either end; means inno side of said latter cyhnder having lifting teriorly of said stationary cylinder arranged to be actuated exteriorly of said outer cylinder to pump fluid therefrom into'said outer cylinder to .elevate the same, and valve means to permit the fluid to drain back into said inner cylinder.

In testimony whereof I aflixmy signature.

OTTO SCHLEMEYER. 

